I love the contrast of light and dark in this photo. I also love the symmetry that the shadow creates (a line down the middle of her face) Also, I love close ups on emotion, this draws in the audience and makes them feel the emotion.
Image by an Iraqi artist taken in an orphanage. This little girl has never seen her mother, so she drew a mom on the ground and fell asleep with her. Such a sad picture. I can only imagine the heartbreak children like this feel.